so this one simple problem:
when using the linux plugin and actually doing something useful with it (controlling player character) I realized that some really important keys are not available as an Axis object: the cursor keys.
Funny enough the "up" key is there but the other 3 are missing. I hope this is only some small bug in jinput not in the linux kernel driver
btw: i am using the linux plugin versioned 1.1beta4 on gentoo linux 2.6.5 (not r1). my keyboard is some plain old mitsumi one without any gimmicks and extras (not even windows keys), although jinput reports some volume up/down keys and such. weird.